Auxiliary device for testing high-low temperature thermal runaway of battery and testing device

Abstract

The utility model relates to the field of battery testing, and provides a battery high-low temperature thermal runaway testing auxiliary device and a testing device, which comprises a cooling unit and a first cooling plate, and the cooling unit is used for providing cooling liquid. A first cooling pipeline communicated with the cooling unit is arranged in the first cooling plate, and the first cooling plate is used for being attached to a battery to be tested to absorb heat. According to the scheme, the liquid cooling system is added to cool the power battery during testing, and meanwhile, the liquid cooling system cools the power battery through the cooling plates clamped on the two sides of the battery and is closer to cooling pipelines on the two sides of the power battery during actual use, so that the state of the power battery during testing is close to a real use environment. By using the cooling configuration close to the actual use environment in the test process, the performance and stability of the battery under various conditions can be evaluated more accurately.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, in particular to a battery high and low temperature thermal runaway test auxiliary device and a test device. Background Art

[0002] High and low temperature environments will have an adverse impact on the use of batteries, such as accelerating capacity decay, increasing internal resistance, and reducing the power output ability of the batteries, which may trigger safety risks such as thermal runaway, overheating, and even fire of the battery system. Battery thermal runaway test refers to the test of placing the battery in a high and low temperature environment, which can better evaluate the temperature control ability, performance decay, and safety performance of the battery system in a high and low temperature environment, so as to better understand the performance of the battery cell.

[0003] In the prior art, power batteries are usually directly tested. However, when power batteries are used during driving, they generally have a liquid cooling system to cool them. If the power batteries are directly tested, it is difficult to simulate the real battery usage environment, resulting in a certain deviation between the final test results and the actual situation. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a battery high and low temperature thermal runaway test auxiliary device and a test device, which can simulate the real power battery usage scenario during battery testing.

[0005] To achieve the above object and other related objects, the present utility model provides a battery high and low temperature thermal runaway test auxiliary device, including:

[0006] A cooling unit for providing coolant;

[0007] A first cooling plate, in which a first cooling pipeline communicating with the cooling unit is arranged, and the first cooling plate is used for attaching to the battery under test to absorb heat.

[0008] In a specific embodiment of the present utility model, it further includes a second cooling plate arranged parallel to the first cooling plate, in which a second cooling pipeline communicating with the cooling unit is arranged, and a space for clamping the battery under test is formed between the first cooling plate and the second cooling plate.

[0009] In a specific embodiment of the present utility model, the first cooling plate and the second cooling plate are arranged at intervals in the up and down direction, and the second cooling plate is located above the first cooling plate.

[0010] In a specific embodiment of the present utility model, at least one limiting side plate is provided on the first cooling plate and / or the second cooling plate. The plate surface of the limiting side plate is perpendicular to the first cooling plate and is located between the first cooling plate and the second cooling plate. The width of the limiting side plate in the up-down direction is less than or equal to the thickness of the battery under test in the up-down direction.

[0011] In a specific embodiment of the present utility model, a temperature control device for controlling the temperature of the coolant and a flow control device for controlling the flow rate of the coolant are provided in the cooling unit.

[0012] In a specific embodiment of the present utility model, the first liquid inlet pipe and the first liquid outlet pipe of the first cooling pipeline are respectively arranged on two opposite side edges of the first cooling plate, and the second liquid inlet pipe and the second liquid outlet pipe of the second cooling pipeline are respectively arranged on two opposite side edges of the second cooling plate.

[0013] The present utility model also provides a battery high-low temperature thermal runaway test device, including:

[0014] A battery high-low temperature thermal runaway test auxiliary device, which is the battery high-low temperature thermal runaway test auxiliary device as described above;

[0015] A heating unit for heating the battery under test;

[0016] A temperature and voltage acquisition module for acquiring the temperature and voltage of the battery under test;

[0017] An expansion force acquisition module for acquiring the expansion force of the battery under test.

[0018] In a specific embodiment of the present utility model, the expansion force acquisition module includes a force sensor arranged above the second cooling plate.

[0019] In a specific embodiment of the present utility model, a heat insulation layer is arranged between the force sensors.

[0020] In a specific embodiment of the present utility model, a pressing plate is arranged on the upper side of the force sensor, and the pressing plate is parallel to the first cooling plate.

[0021] The present utility model provides a battery high-low temperature thermal runaway test auxiliary device and a test device. In the above solution, a liquid cooling system is added to cool the power battery during the test. At the same time, the liquid cooling system is cooled by the cooling plates clamped on both sides of the battery, which is closer to the cooling pipelines on both sides during the actual use of the power battery. In this way, the state of the power battery during the test can be close to the actual use environment. By using a cooling configuration close to the actual use environment during the test, the performance and stability of the battery under various conditions can be evaluated more accurately. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of an auxiliary device for testing high and low temperature thermal runaway of a battery in a specific embodiment of the present utility model;

[0024] Figure 2 It is a characteristic parameter diagram of the thermal runaway of a battery cell during battery testing in a specific embodiment of the present utility model;

[0025] Figure 3 It is a differential curve diagram of the characteristic parameters of the thermal runaway of a battery cell during battery testing in a specific embodiment of the present utility model.

[0026] Brief Description of the Drawings: 1. Battery to be tested; 2. Temperature and voltage acquisition module; 3. Expansion force acquisition module; 10. First cooling plate; 11. First liquid inlet pipe; 12. First liquid outlet pipe; 20. Second cooling plate; 21. Second liquid inlet pipe; 22. Second liquid outlet pipe; 30. Cooling unit; 31. Interface; 40. Force sensor; 50. Heat insulation layer; 60. Pressing plate; 70. Limit side plate. Detailed Embodiments

[0027] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0029] Battery thermal runaway testing is an important test conducted on battery packs in electric vehicles or energy storage systems, aiming to evaluate and verify the safety performance of batteries under extreme conditions. Thermal runaway generally refers to the intense exothermic reaction that may occur in batteries under abnormal conditions (such as overcharging, over-discharging, external short-circuit, etc.), resulting in a sharp rise in battery temperature, and then triggering a thermal runaway event, which may lead to fire or explosion.

[0030] Battery thermal runaway testing mainly evaluates the safety of batteries under extreme conditions, especially in situations that may lead to thermal runaway. And it verifies whether the thermal management and safety mechanisms of the battery system design are effective, ensuring that the battery can operate safely or automatically cut off the power supply to prevent accidents in potential dangerous situations.

[0031] Battery thermal runaway testing mainly simulates abnormal conditions that may lead to thermal runaway, such as overvoltage during charging, external short-circuit or internal faults, etc., through artificial or testing equipment. Then it monitors the temperature change, voltage change and any abnormal behavior of the battery in real time, and records the data for subsequent analysis. Finally, it analyzes the behavior and reaction of the battery under thermal runaway conditions based on the test data and observation results, and evaluates its safety performance and thermal management effect.

[0032] During the testing process of the prior art, a cooling configuration similar to a real liquid cooling system was not used, and there may be a large difference between the operating temperature of the battery in the test and its actual use. This may lead to inaccurate test results because the performance and safety of the battery may vary significantly at different temperatures. During the vehicle operation of power batteries, its cooling system is not only for cooling, but also needs to adapt to changing workloads. Testing the battery directly without considering the real cooling pipelines and load conditions may not accurately simulate the dynamic operating state of the battery in actual use. Due to the failure to simulate the real usage environment, the final test results may deviate from the actual situation. This will affect the accuracy and reliability of the battery system design, and may lead to unexpected problems or performance degradation in actual applications.

[0033] As Figure 1 shown, to achieve the above and other related purposes, the present utility model proposes a battery high and low temperature thermal runaway testing auxiliary device, including a cooling unit 30 and a first cooling plate 10.

[0034] The cooling unit 30 is used to provide coolant, and the cooling unit 30 is a water chiller. As the core component of the entire system, the cooling unit 30 is used to provide coolant, usually through a water cooling circulation system. The water chiller controls the temperature of the battery by circulating water or other cooling media. It can absorb heat from the battery and transfer the heat to an external radiator or cooler to keep the battery within a certain operating temperature range.

[0035] In a specific embodiment of the present utility model, a temperature control device for controlling the temperature of the coolant and a flow control device for controlling the coolant flow rate are provided inside the cooling unit 30. The temperature control device generally consists of the following main parts:

[0036] A temperature sensor for detecting the real-time temperature of the coolant. The sensor can be a resistance temperature probe (such as PT100), a thermistor (such as NTC), or a thermocouple, etc.

[0037] A controller that, based on the temperature signal feedback from the sensor, will perform logical judgment and calculation, and then output a control signal to the actuator to adjust other parts of the cooling system.

[0038] An actuator that, according to the instruction of the controller, can be a heater, a cooler, or other devices capable of adjusting the medium temperature.

[0039] The flow control device generally includes the following components:

[0040] A flow sensor for detecting the real-time flow rate of the coolant flowing through the pipeline. The sensor can be an electromagnetic flowmeter, an ultrasonic flowmeter, or a thermal flowmeter, etc.

[0041] A controller that, based on the data feedback from the flow sensor, will perform calculation and decision-making, and then output a control signal to the actuator.

[0042] An actuator that, according to the instruction of the controller, may be a regulating valve, an electric valve, or a variable frequency drive pump, etc., for adjusting the coolant flow rate.

[0043] Setting the temperature control device and the flow control device can adjust the temperature and flow rate of the coolant in real time to simulate real usage scenarios, and at the same time, usage scenarios of simulating the out-of-control of the cooling system can be controlled. In this way, the temperature control device and the flow control device can be effectively used to simulate and test the behavior of the cooling system under various normal and abnormal conditions, thereby improving the reliability and safety of the system.

[0044] The first cooling plate 10 is provided with a first cooling pipeline communicating with the cooling unit 30 therein, and the first cooling plate 10 is used to fit against the battery under test 1 for heat absorption. The first cooling plate 10 is designed to be able to directly fit against the surface of the battery under test 1. Through this fitting method, the first cooling plate 10 can contact the heat released from the battery surface to the greatest extent. This fitting method simulates the installation situation of the cooling pipeline when the battery under test 1 is actually installed, ensuring the authenticity and accuracy of heat transfer during the test. The direct fitting design makes the installation of the battery high and low temperature thermal runaway test auxiliary device more convenient and direct. Without complex installation steps or additional support structures, the first cooling plate 10 can be directly fitted against the battery under test 1, thus quickly building a test environment.

[0045] As Figure 1 shown, it further includes a second cooling plate 20 arranged parallel to the first cooling plate 10. The second cooling plate 20 is provided with a second cooling pipeline communicating with the cooling unit 30 therein. A space for clamping the battery under test 1 is formed between the first cooling plate 10 and the second cooling plate 20. The battery under test 1 is placed between the first cooling plate 10 and the second cooling plate 20, so that the battery surface can simultaneously contact the fitting parts of the two cooling plates. This clamping design ensures that the battery under test 1 can fully contact the cooling plates, thereby maximizing the heat transfer efficiency and the accuracy of the test. The advantage of this parallel arrangement of cooling plates is that it can evenly distribute the cooling medium and the heat absorption area, ensuring temperature stability and accuracy during the test. At the same time, through the parallel arrangement design, the test system can better simulate the thermal management environment of the battery under test 1 in actual applications, providing a more real and reliable performance evaluation.

[0046] Valves or similar devices are installed in the cooling pipelines of the first cooling plate 10 and the second cooling plate 20. These valves can be used to control the flow path of the cooling medium, so as to selectively allow the cooling medium to flow through the first cooling plate 10 or the second cooling plate 20, or both work simultaneously. By controlling these valves, different cooling configurations can be switched during the test to simulate the actual cooling pipeline arrangements of battery packs in different vehicle models. When the valve is set to allow the cooling medium to only flow through the first cooling plate 10, it simulates the situation where only one side (or a specific side) of the battery pack in the vehicle model is provided with a cooling pipeline. This configuration is applicable to vehicles that only install cooling pipelines on one side of the battery pack. When the valve is set to allow the cooling medium to flow through both the first and second cooling plates 20 simultaneously, it simulates the situation where cooling pipelines are provided on both sides of the battery pack in the vehicle model. This configuration is applicable to vehicles that install cooling pipelines on both sides (or all sides) of the battery pack.

[0047] This design provides flexible test options, enabling the comparison and evaluation of different cooling configurations on the same test device. Testers can adjust the working mode of the cooling system by simply operating the valves according to specific requirements and vehicle models, without changing the layout of the entire test device or reconfiguring it.

[0048] Both the first cooling plate 10 and the second cooling plate 20 are made of heat-conducting materials. For example, copper, aluminum, or their alloys are often used as heat-conducting materials. They not only have good heat-conducting performance but also usually have high corrosion resistance and mechanical strength, making them suitable for long-term use in the cooling system.

[0049] Among them, the cooling unit 30, the first cooling pipeline, and the second cooling pipeline are all made of fireproof materials. Battery thermal runaway may cause a sharp rise in the ambient temperature, which may damage the pipeline materials, especially if the pipelines are exposed to flames. Using fireproof materials for the pipelines can, to a certain extent, protect the structural integrity of the pipelines and delay the damage of the pipeline materials by flames. Multiple interfaces 31 communicating with the first cooling pipeline and the second cooling pipeline are provided on the cooling unit 30.

[0050] As Figure 1 shown, the first liquid inlet pipe 11 and the first liquid outlet pipe 12 of the first cooling pipeline are respectively arranged on two opposite side edges of the first cooling plate 10, and the second liquid inlet pipe 21 and the second liquid outlet pipe 22 of the second cooling pipeline are respectively arranged on two opposite side edges of the second cooling plate 10. The side edge refers to the side edge of the cooling plate. Arranging the pipelines along its edge can ensure that the pipelines do not interfere with the fitting and contact between the battery 1 under test and the surface of the cooling plate. This design enables the cooling medium to effectively enter and exit the first cooling plate 10 without affecting the installation and testing of the battery. The pipelines do not occupy the main plane of the cooling plate, thus minimizing the spatial impact on the battery 1 or device under test to the greatest extent. The position arrangement on the side edge makes the installation and maintenance of the pipelines more convenient, while also ensuring the efficiency and reliability of the cooling system.

[0051] As Figure 1As shown, the first cooling plate 10 and the second cooling plate 20 are arranged at intervals in the vertical direction, and the second cooling plate 20 is located above the first cooling plate 10. Placing the battery 1 to be tested directly on the first cooling plate 10 and then arranging the second cooling plate 20 above it can better simulate the posture of the battery in actual applications. This layout ensures the position of the cooling plate and the relative position of the battery, which helps to more accurately evaluate the cooling effect of the battery in the working state. The flat layout simplifies the process of setting up the test scenario. Just place the two cooling plates layer by layer, and the structure required for the test can be quickly established, saving time and human resources. Due to the simple and intuitive layout, this structure is also more convenient for adjustment and maintenance. When it is necessary to change the position of the battery or the cooling plate, the operation is relatively simple, and the test layout can be quickly reconfigured. By a layout closer to the actual working conditions, the accuracy and repeatability of the test can be improved. This is crucial for evaluating the cooling performance and safety of the battery under different conditions.

[0052] As Figure 1 shown, at least one limiting side plate 70 is provided on the first cooling plate 10 and / or the second cooling plate 20. The plate surface of the limiting side plate 70 is perpendicular to the first cooling plate 10 and is located between the first cooling plate 10 and the second cooling plate 20. The width of the limiting side plate 70 in the vertical direction is less than or equal to the thickness of the battery 1 to be tested in the vertical direction. Among them, the limiting side plate 70 can be adjusted according to the actual thickness of the battery cell to be applicable to battery cells of various thicknesses.

[0053] The main function of the limiting side plate 70 is to fix and position the battery 1 to be tested during the test process to prevent it from accidentally moving or swinging. This is particularly important for applications that require precise control of the battery position for stable testing. The width setting of the limiting side plate 70 ensures that it does not interfere with the first cooling plate 10 and the second cooling plate 20 while limiting the battery.

[0054] The present utility model also proposes a battery high and low temperature thermal runaway test device, including the battery high and low temperature thermal runaway test auxiliary device as described above, a heating unit, a temperature and voltage acquisition module 2, and an expansion force acquisition module 3.

[0055] The heating unit is used to heat the battery 1 to be tested, and an internal heating film is used to trigger the thermal runaway of the battery cell. During the test, the heating unit can accurately control the heating process to simulate the behavior and response of the battery under different temperature conditions.

[0056] The temperature and voltage acquisition module 2 is used to acquire the temperature and voltage of the battery under test 1. The temperature and voltage acquisition module 2 is electrically connected to the battery, and this module is responsible for acquiring the temperature and voltage data of the battery under test 1. These data are crucial for analyzing the thermal and electrical characteristics of the battery during the test. By monitoring the temperature change and voltage condition of the battery in real time, its safety and performance can be evaluated.

[0057] The expansion force acquisition module 3 is used to acquire the expansion force of the battery under test 1. The expansion force acquisition module 3 is used to measure the expansion force that the battery under test 1 may generate during thermal runaway. When the battery undergoes thermal runaway, it may be accompanied by gas release and an increase in internal pressure of the battery, resulting in the expansion of the battery case or packaging. By acquiring and analyzing the expansion force data, the response ability and safety of the battery under different conditions can be understood.

[0058] As Figure 1 shown, the expansion force acquisition module 3 includes a force sensor 40 disposed above the second cooling plate 20. The sensor 40 is a high-precision force sensor and may be arranged in an array form. This design can provide high-resolution monitoring of the expansion or contraction of the battery because it can obtain data from multiple positions simultaneously. When testing the expansion or contraction of the battery during temperature changes, these changes can be quantified by monitoring the feedback of the sensor, thereby evaluating the stability and reliability of the battery material and design.

[0059] As Figure 1 shown, a heat insulation layer 50 is provided between the force sensors 40. When the battery undergoes thermal runaway, it may generate very high temperatures, and these temperatures may be quickly conducted to the contact surfaces, including the force sensor 40. Setting the heat insulation layer 50 can effectively prevent the overheated battery from directly conducting high temperatures to the sensor, thereby protecting the sensor from heat damage or performance degradation. The performance and accuracy of the force sensor 40 may be affected by temperature. Through the heat insulation layer 50, the influence of external heat sources on the sensor can be reduced, ensuring that the measured data is as accurate and stable as possible and not disturbed by temperature changes.

[0060] As Figure 1 shown, a pressure plate 60 is provided on the upper side of the force sensor 40, and the pressure plate 60 is parallel to the first cooling plate 10. The presence of the pressure plate can ensure that during the measurement process, the pressure received by the sensor 40 comes from the uniform force of the battery or the test object. By setting it parallel to the first cooling plate, errors caused by external forces or uneven application can be minimized.

[0061] The test can be carried out according to the following steps:

[0062] S1. Set up the test environment. Install the battery to be tested on the battery high and low temperature thermal runaway test device for testing. This is to simulate the real operating environment in order to evaluate the performance of the battery under various temperature conditions.

[0063] S2. Adjust the coolant temperature to the preset value through the cooling unit. Select the preset coolant temperature according to the actual vehicle situation and test requirements. This temperature can be any value between -20°C and 60°C, depending on the test purpose, such as simulating cold winter conditions or hot summer conditions. Record the time and process when the coolant reaches the preset temperature. These data can be reported and analyzed as part of the test.

[0064] S3. Start heating the battery to be tested through the heating unit to simulate the battery thermal runaway state. Start the heating unit to start heating the battery to be tested. During the heating process, the system needs to stably control the heating rate of the temperature to simulate the possible rapid temperature rise of the battery in the thermal runaway state. During the whole heating process, it is necessary to monitor the temperature change of the battery and the operating parameters of the heating unit in real time. These data are usually recorded through the data acquisition system for subsequent analysis and evaluation.

[0065] S4. Obtain the battery expansion force, temperature and voltage. The temperature and voltage acquisition module 2 and the expansion force acquisition module 3 are used to collect the battery expansion force, temperature and voltage. When conducting battery tests or experiments, monitor and record the data of temperature, voltage and expansion force in real time. These data can be analyzed in real time through computer software and saved as data files for subsequent analysis and reporting.

[0066] S5. Judge the battery state according to the battery expansion force, temperature and voltage. When the battery expansion force, temperature and voltage do not exceed the threshold values, it is judged that the battery is in a normal state; when the battery expansion force first exceeds the threshold value, it is judged that the battery is in a force thermal runaway state; when the temperature first exceeds the threshold value, it is judged that the battery is in a temperature thermal runaway state; when the voltage signal first exceeds the threshold value, it is judged that the battery is in a force thermal runaway state.

[0067] S6. Adjust the cooling unit parameters according to the battery state. The cooling unit parameters include coolant temperature and flow rate. As shown in Table 1, the cooling unit can be linked with the battery state for adjustment to simulate the effects of various actions of the vehicle cooling system on the subsequent battery expansion force, temperature and voltage during thermal runaway. When the battery is in a normal state, the cooling unit can maintain an appropriate coolant temperature and flow rate to ensure that the battery operates within the normal operating temperature range.

[0068] Specifically, it can be:

[0069] Under the temperature thermal runaway state, the coolant flow rate can be controlled to be unchanged, and at the same time, the battery temperature change is monitored to test the subsequent changes when the coolant flow rate of the vehicle cooling system remains unchanged during thermal runaway.

[0070] Under the temperature thermal runaway state, the coolant flow rate can be controlled to increase, while monitoring the change of the battery temperature, so as to test the subsequent changes when the flow rate of the vehicle cooling system increases during thermal runaway;

[0071] Under the temperature thermal runaway state, the coolant temperature can be controlled to decrease, while monitoring the change of the battery temperature, so as to test the subsequent changes when the temperature of the vehicle cooling system decreases during thermal runaway;

[0072] Under the temperature thermal runaway state, the coolant temperature can be controlled to remain unchanged, while monitoring the change of the battery temperature, so as to test the subsequent changes when the temperature of the vehicle cooling system remains unchanged during thermal runaway;

[0073] Under the temperature thermal runaway state, the cooling unit can be controlled to be turned off, while monitoring the change of the battery expansion force, so as to test the subsequent changes when the flow rate of the vehicle cooling system fails during thermal runaway;

[0074] Under the temperature thermal runaway state, the cooling unit can be controlled to be turned off, while monitoring the change of the battery temperature, so as to test the subsequent changes when the flow rate of the vehicle cooling system fails during thermal runaway;

[0075] Under the temperature thermal runaway state, the cooling unit can be controlled to be turned off, while monitoring the change of the battery voltage, so as to test the subsequent changes when the flow rate of the vehicle cooling system fails during thermal runaway.

[0076] Table 1: Thermal runaway control parameters of battery cells under different combinations. The √ in the table represents the corresponding collected signal.

[0077]

[0078] S7. Record and store the data of the battery expansion force, temperature and voltage changing with time during the above process. After recording the data, the thermal runaway characteristic parameter diagram of the battery cell as shown in Figure 2 and the differential curve diagram of the thermal runaway characteristic parameters of the battery cell as shown in Figure 3 can be drawn.

[0079] To sum up, the present utility model provides a battery high and low temperature thermal runaway test auxiliary device and a test device. In the above scheme, a liquid cooling system is added to cool the power battery during the test, and at the same time, the liquid cooling system is cooled through the cooling plates clamped on both sides of the battery, which is closer to the cooling pipelines on both sides during the actual use of the power battery. In this way, the state of the power battery during the test can be close to the actual use environment. By using a cooling configuration close to the actual use environment during the test, the performance and stability of the battery under various conditions can be evaluated more accurately.

[0080] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model. Efficiently realize the high-voltage connection between the motor and the controller, with a small volume and an oil-resistant sealing design to achieve reliable sealing between the controller cavity and the motor cavity. The battery high and low temperature thermal runaway test auxiliary device and the test device have an oil-cooling design, which can effectively reduce the temperature, achieve greater current flow, and extend the product life.

[0081] In the description herein, numerous specific details are provided, such as examples of components and / or methods, to provide a complete understanding of the embodiments of the present utility model. However, those skilled in the art will recognize that the embodiments of the present utility model can be practiced without one or more of the specific details or by other devices, systems, components, methods, parts, materials, parts, etc. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present utility model.

[0082] It should be understood throughout the specification that references to "an embodiment", "embodiment", or "specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model and not necessarily in all embodiments. Thus, the appearances of the phrases "in an embodiment", "in an embodiment", or "in a specific embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Additionally, the particular features, structures, or characteristics of any specific embodiment of the present utility model can be combined in any suitable manner with one or more other embodiments. It is to be understood that other variations and modifications of the embodiments of the utility model described and shown herein may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the present utility model.

[0083] It should also be understood that one or more of the elements shown in the drawings can be implemented in a more separated or more integrated manner, or even removed if in some cases inoperable or provided because it can be useful for a particular application.

[0084] In addition, unless otherwise explicitly specified, any marked arrows in the drawings should be considered exemplary only and not limiting. Moreover, unless otherwise specified, the term "or" as used herein generally intends to mean "and / or". In cases where the separation or combination ability of the terms is unclear and foreseeable, the combination of components or steps will also be considered to have been specified.

[0085] As used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" include plural referents. Also, as used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the meaning of "in" includes "in" and "on".

[0086] The foregoing description of the exemplary embodiments of the present invention (including what is described in the abstract) is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of the invention and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications will be apparent to and can be made by those skilled in the art within the spirit and scope of the present invention. As noted, these modifications can be made to the present invention in accordance with the foregoing description of the exemplary embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.

[0087] The systems and methods have been described generally herein to facilitate an understanding of the details of the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, one of ordinary skill in the relevant art will recognize that the embodiments of the present invention may be practiced without one or more of the specific details, or with other devices, systems, components, methods, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0088] Accordingly, while the present invention has been described herein with reference to its specific embodiments, modifications, various changes and substitutions are also within the foregoing disclosure, and it is to be understood that in some instances, some features of the present invention will be employed without a corresponding use of other features without departing from the scope and spirit of the claimed invention. Accordingly, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms and / or the specific embodiments disclosed as the best mode contemplated for carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the present invention will be determined only by the appended claims.

Claims

1. An auxiliary device for testing high and low temperature thermal runaway of a battery, characterized in that Comprising: A cooling unit for providing coolant. A first cooling plate, within which a first cooling pipeline communicating with the cooling unit is provided, and the first cooling plate is used to be attached to the battery under test for heat absorption.

2. The battery high and low temperature thermal runaway test auxiliary device according to claim 1, wherein, It further comprises a second cooling plate arranged parallel to the first cooling plate, within which a second cooling pipeline communicating with the cooling unit is provided, and a space for clamping the battery under test is formed between the first cooling plate and the second cooling plate.

3. The battery high and low temperature thermal runaway test auxiliary device according to claim 2, wherein The first cooling plate and the second cooling plate are arranged at intervals in the up-and-down direction, and the second cooling plate is located above the first cooling plate.

4. The battery high and low temperature thermal runaway test auxiliary device according to claim 3, wherein At least one limiting side plate is provided on the first cooling plate and / or the second cooling plate, the plate surface of the limiting side plate is perpendicular to the first cooling plate and is located between the first cooling plate and the second cooling plate, and the width of the limiting side plate in the up-and-down direction is less than or equal to the thickness of the battery under test in the up-and-down direction.

5. The battery high and low temperature thermal runaway test auxiliary device according to claim 1, characterized in that, A temperature control device for controlling the temperature of the coolant and a flow control device for controlling the flow rate of the coolant are provided within the cooling unit.

6. The battery high and low temperature thermal runaway test auxiliary device according to claim 2, characterized in that, The first inlet pipe and the first outlet pipe of the first cooling pipeline are respectively arranged on two opposite side edges of the first cooling plate, and the second inlet pipe and the second outlet pipe of the second cooling pipeline are respectively arranged on two opposite side edges of the second cooling plate.

7. A high and low temperature thermal runaway test device for a battery, characterized in that, Comprising: An auxiliary device for testing high and low temperature thermal runaway of a battery, which is the auxiliary device for testing high and low temperature thermal runaway of a battery as described in any one of claims 1-6; A heating unit for heating the battery under test; A temperature and voltage acquisition module for acquiring the temperature and voltage of the battery under test; An expansion force acquisition module for acquiring the expansion force of the battery under test.

8. The battery high and low temperature thermal runaway test auxiliary device according to claim 3, characterized in that, The expansion force acquisition module includes a force sensor arranged above the second cooling plate.

9. The battery high and low temperature thermal runaway test auxiliary device according to claim 8, characterized in that, A heat insulation layer is provided between the force sensors.

10. The battery high and low temperature thermal runaway test auxiliary device according to claim 8, wherein A pressing plate is provided on the upper side of the force sensor, and the pressing plate is parallel to the first cooling plate.

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